5 + .04t < 2 + .10t
3 < .06t
t > 3/.06 = 50
Long distance Phone Company A charges a base rate of $5.00 per month plus 4 cents a minute that you're on the phone. Long distance Phone Company B charges a base rate of only $2.00 per month but they charge 10 cents per minute used. How much time per month would you have to talk on the phone before subscribing to Company A would save you money?
2 answers
51
4 answers